Layout is a framework for implementing iOS user interfaces using runtime-evaluated expressions for layout and XML template files. It is intended as a more-or-less drop-in replacement for Nibs and Storyboards, but offers a number of advantages.
To find out more about

Default is a library that extends what UserDefaults can do by providing extensions for saving custom objects that conform to Codable and also providing a new interface to UserDefaults described below, via the protocol DefaultStorable. You can use only the Codable support extensions or the DefaultStorable protocol extensions or both.

The project spec is a YAML or JSON file that defines your targets, configurations, schemes and custom build settings. All you source directories are automatically parsed and referenced appropriately while preserving your folder structure. Sensible defaults are used in many

GitHawk is a small iOS app that makes managing GitHub accounts and projects a little easier. It exists because GitHub's mobile interface is missing features and is slow.
It is also proof that you can build rather complicated Swift apps with IGListKit.
Why

An Xcode Source Editor Extension that helps navigating to many places easier
Available via Editor -> XcodeWay
Features
Go To Project Folder: Open the selected Xcode project folder in Finder
Go To iTerm: Open the selected Xcode project folder in iTerm

Better way to identify whats different between 2 instances.
Have you ever written tests? Usually they use equality asserts, e.g. XCTAssertEqual, what happens if the object aren't equal ? Xcode throws wall of text at you:
This forces you to manually scan the

Tiling window manager for macOS along the lines of xmonad.
A quick screencast of basic functionality can be found here. (It's rough, and I'd love to see a better one if someone has the skills and inclination to make one.)
Getting Amethyst
Amethyst is available